Law / Waiting for karta niebieska... (blue card) - can I change my job in Poland? [7]

Hello;

I am non-european citizen and i had karty pobytu because of the work. I applied for blue card at october, my decision date was on march however foreigners office still didn't decide about my card. I'd like to change my job however my karty pobytu is expired and i dont have visa, resident card or any other thing to proof that i am legally here. Actually , i am legally here until i receive the negative decision(no decision yet).

Is there any lawyer can help me to have the karta niebieska ? why it takes that long ? I wrote official request to foreigners office that i need explanation but they didn't reply back. What can i do ?

The other question is : Can i change my job even if i dont have any residence card at the moment ?

I am staying here because of work, i am not married with european citizen.

Thank you for the answers in advance .